get resolved OpenAPI servers (#176)

Author: hauner

openapi-processor-core/src/main/kotlin/io/openapiprocessor/core/parser/openapi/v30/OpenApi.kt

@@ -25,7 +25,13 @@ open class OpenApi(
     private val log: Logger = LoggerFactory.getLogger(this.javaClass.name)
 
     override fun getServers(): List<Server> {
-        return listOf()
+        val servers = mutableListOf<Server>()
+
+        api.servers.forEach { server ->
+            servers.add(Server(server))
+        }
+
+        return servers
     }
 
     override fun getPaths(): Map<String, Path> {

openapi-processor-core/src/main/kotlin/io/openapiprocessor/core/parser/openapi/v30/Server.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2024 https://github.com/openapi-processor/openapi-processor-core
+ * PDX-License-Identifier: Apache-2.0
+ */
+
+package io.openapiprocessor.core.parser.openapi.v30
+
+import io.github.stduritemplate.StdUriTemplate
+import java.net.URI
+import io.openapiparser.model.v30.Server as Server30
+import io.openapiprocessor.core.parser.Server as ParserServer
+
+class Server(private val server: Server30): ParserServer {
+
+    override fun getUri(): URI {
+        val variables = mutableMapOf<String, Any>()
+
+        server.variables.forEach { variable ->
+            variables[variable.key] = variable.value.default
+        }
+
+        return URI.create(StdUriTemplate.expand(server.url, variables))
+    }
+}

openapi-processor-core/src/main/kotlin/io/openapiprocessor/core/parser/openapi/v31/OpenApi.kt

@@ -20,7 +20,13 @@ class OpenApi(
     private val log: Logger = LoggerFactory.getLogger(this.javaClass.name)
 
     override fun getServers(): List<Server> {
-        return listOf()
+        val servers = mutableListOf<Server>()
+
+        api.servers.forEach { server ->
+            servers.add(Server(server))
+        }
+
+        return servers
     }
 
     override fun getPaths(): Map<String, ParserPath> {

openapi-processor-core/src/main/kotlin/io/openapiprocessor/core/parser/openapi/v31/Server.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2024 https://github.com/openapi-processor/openapi-processor-core
+ * PDX-License-Identifier: Apache-2.0
+ */
+
+package io.openapiprocessor.core.parser.openapi.v31
+
+import io.github.stduritemplate.StdUriTemplate
+import java.net.URI
+import io.openapiparser.model.v31.Server as Server31
+import io.openapiprocessor.core.parser.Server as ParserServer
+
+class Server(private val server: Server31): ParserServer {
+
+    override fun getUri(): URI {
+        val variables = mutableMapOf<String, Any>()
+
+        server.variables.forEach { variable ->
+            variables[variable.key] = variable.value.default
+        }
+
+        return URI.create(StdUriTemplate.expand(server.url, variables))
+    }
+}

openapi-processor-core/src/test/kotlin/io/openapiprocessor/core/parser/openapi/ServerSpec.kt

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2024 https://github.com/openapi-processor/openapi-processor-core
+ * PDX-License-Identifier: Apache-2.0
+ */
+
+package io.openapiprocessor.core.parser.openapi
+
+import io.kotest.core.spec.style.StringSpec
+import io.kotest.matchers.collections.shouldHaveSize
+import io.kotest.matchers.shouldBe
+import io.openapiprocessor.test.stream.Memory
+import java.net.URI
+
+class ServerSpec: StringSpec({
+
+    "get server from openapi 3.0" {
+        val parser = Parser()
+
+        Memory.add("openapi.yaml", """
+            openapi: 3.0.5
+            servers:
+              - url: "{schema}://{host}:{port}/{path1}/{path2}/v{version}"
+                variables:
+                  schema:
+                    default: https
+                    enum:
+                      - https
+                      - http
+                  host:
+                    default: openapiprocessor.io
+                  port:
+                    default: "443"
+                  path1:
+                    default: foo
+                  path2:
+                    default: bar
+                  version:
+                    default: "1"
+        """.trimIndent())
+
+        val api = parser.parse("memory:openapi.yaml")
+
+        val servers = api.getServers()
+        servers shouldHaveSize 1
+        servers[0].getUri() shouldBe URI.create("https://openapiprocessor.io:443/foo/bar/v1")
+    }
+
+    "get server from openapi 3.1" {
+        val parser = Parser()
+
+        Memory.add("openapi.yaml", """
+            openapi: 3.1.0
+            servers:
+              - url: "{schema}://{host}:{port}/{path1}/{path2}/v{version}"
+                variables:
+                  schema:
+                    default: https
+                    enum:
+                      - https
+                      - http
+                  host:
+                    default: openapiprocessor.io
+                  port:
+                    default: "443"
+                  path1:
+                    default: foo
+                  path2:
+                    default: bar
+                  version:
+                    default: "1"
+        """.trimIndent())
+
+        val api = parser.parse("memory:openapi.yaml")
+
+        val servers = api.getServers()
+        servers shouldHaveSize 1
+        servers[0].getUri() shouldBe URI.create("https://openapiprocessor.io:443/foo/bar/v1")
+    }
+})